package edu.sctu.practice.class02.Wangpeng.Dtest7;

/**
 * Created by wp on 2016/1/8.
 */
public class Praticse extends Examinnation {
    int x=20,y=30;
    double add(){return super.x+super.y;}
    double addB(){ return  x+y;}
    double addA(){ return  super.add();}

}
